lost iphone icons

hey everyone
i have an unlocked 1.1.1 iphone and i had customize on it and installer and all that that stuff and i made the customise icon disapear by acciddent and the also the installer icon so i cant access thouse applications how can i get them to the home screen again, i know there in the iphone but i cant activate them as the buttons arent there and both apps are the main ones for customising your iphone any suggestions or solutions are more than welcome.

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